Number of shares outstanding for Alnylam Pharmaceuticals (ALNY)

Number of shares outstanding as of December 2025 : 131,447,000

According to Alnylam Pharmaceuticals 's latest financial reports and stock price the company's current number of shares outstanding is 131,447,000. At the end of 2025 the company had 131,447,000 shares outstanding. The number of outstanding shares is usually impacted by stock plits and shares buy back.

Shares outstanding history for Alnylam Pharmaceuticals from 2003 to 2025

Shares Outstanding at the end of each year

Year	Shares Outstanding	Change
2025	0.13 B	2.22%
2024	0.12 B	2.37%
2023	0.12 B	1.9%
2022	0.12 B	2.92%
2021	0.11 B	3.01%
2020	0.11 B	4.05%
2019	0.11 B	10.57%
2018	0.10 B	5.12%
2017	96.13 M	11.99%
2016	85.84 M	1.15%
2015	84.87 M	10.28%
2014	76.95 M	22.33%
2013	62.9 M	21.4%
2012	51.82 M	21.49%
2011	42.65 M	1.26%
2010	42.12 M	1%
2009	41.7 M	1.24%
2008	41.19 M	5.57%
2007	39.02 M	21.49%
2006	32.12 M	53.59%
2005	20.91 M	7.21%
2004	19.5 M	2209.85%
2003	0.84 M

Shares Outstanding for similar companies or competitors

Company	Shares Outstanding	differencediff.	Country
Arrowhead Pharmaceuticals ARWR	139,039,000	5.78%	🇺🇸 USA
Regeneron Pharmaceuticals REGN	103,600,000	-21.18%	🇺🇸 USA
Sarepta Therapeutics SRPT	100,237,000	-23.74%	🇺🇸 USA
OPKO Health OPK	777,154,808	491.23%	🇺🇸 USA
Regulus Therapeutics RGLS	66,174,550	-49.66%	🇺🇸 USA
Novartis NVS	1,926,000,000	1,365.23%	🇨🇭 Switzerland
Sanofi SNY	2,436,200,000	1,753.37%	🇫🇷 France
Teva Pharmaceutical Industries TEVA	1,147,000,000	772.60%	🇮🇱 Israel

What is the market capitalization of a company?

The market capitalization sometimes referred as Marketcap, is the value of a publicly listed company.
In most cases it can be easily calculated by multiplying the share price with the amount of outstanding shares.

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